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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS Part 10 (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013
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Pension Plans [Member] | Paid From Qualified Trust [Member] |
Expected benefit payments [Abstract] |
2014 | $ 22.9
2015 | 25.3
2016 | 27.2
2017 | 30.8
2018 | 34.2
2019 - 2023 | 227.2
Pension Plans [Member] | Paid From Laclede Gas Funds [Member] |
Expected benefit payments [Abstract] |
2014 | 0.4
2015 | 0.5
2016 | 0.5
2017 | 0.6
2018 | 0.6
2019 - 2023 | 4.5
Postretirement Plans [Member] | Paid From Qualified Trust [Member] |
Expected benefit payments [Abstract] |
2014 | 9.5
2015 | 9.9
2016 | 10.7
2017 | 11.7
2018 | 12.8
2019 - 2023 | 84.1
Postretirement Plans [Member] | Paid From Laclede Gas Funds [Member] |
Expected benefit payments [Abstract] |
2014 | 0.3
2015 | 0.3
2016 | 0.3
2017 | 0.4
2018 | 0.4
2019 - 2023 | $ 2.2

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- Definition Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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